Rostrup-Nielsen

J.R. Rostrup-Nielsen, Catalytic Steam Reforming , Catalysis, Science and Technology, vol. 5, p.l, J.R. Anderson and M. Boudan, (Eds.), Springer, Berlin, 1984. 

In a number of publications, Rostrup-Nielsen discusses different mechanism of methane steam reforming over Ni catalysts [17]. The proposed simplified reaction sequence for reforming of methane is as follows ... 

On the surface of the Ni catalyst, carbon is normally produced in a whisker (or filamentous) form. According to Rostrup-Nielsen, carbon formation is avoided when the concentration of carbon dissolved in Ni crystal is smaller than that at the equilibrium. The steady-state activity is proportional to [C ], which can be expressed by the following equation ... 

Another important factor affecting carbon deposition is the catalyst surface basicity. In particular, it was demonstrated that carbon formation can be diminished or even suppressed when the metal is supported on a metal oxide carrier with a strong Lewis basicity [47]. This effect can be attributed to the fact that high Lewis basicity of the support enhances the C02 chemisorption on the catalyst surface resulting in the removal of carbon (by surface gasification reactions). According to Rostrup-Nielsen and Hansen [12], the amount of carbon deposited on the metal catalysts decreases in the following order ... 

Rostrup-Nielsen, J., Production of synthesis gas, Catal. Today, 18,305,1993. 

Rostrup-Nielsen, J. and Bak Hansen, J., COz-reforming of methane over transition metals, J. Catal., 144,38,1993. 

Joensen, F. and Rostrup-Nielsen, R., Conversion of hydrocarbons and alcohols for fuel cells, /. Power Sources, 105, 195,2002. 

Rostrup-Nielsen, J. R., Syngas in perspective, Catalysis Today 2002, 71, 243. 

Inui (180) and Rostrup-Nielsen et al. (175) reported that the amount of carbon deposited on metal catalysts decreases in the order Ni Rh > Ir = Ru > Pt = Pd at 773 K and Ni > Pd = Rh > Ir > Pt Ru at 923 K. Thus, the noble metals exhibit higher selectivities for a carbon-free operation than nickel. Nevertheless, carbon deposition does also occur on noble metals. 

J. R. Rostrup-Nielsen, Phys. Chem. Chem. Phys., 2001, 3, 283. 

The authors wish to thank Dr. J. Rostrup-Nielsen (Haldor Tops e A.S.) for his continuous interest in this work. They are also indebted to Elsevier Scientific Publishing Co. for having granted the permission to publish original data. 

S. Helveg, C. Lopez-Cartes, J. Sehested, P. Hansen, B. Clausen, J. Rostrup-Nielsen, F. Abild-Pedersen, and J. Norskov, Atomic-scale imaging of carbon nanofibre growtti. Nature 427,426-429 (2004). 

Fuel Processing for High Efficiency Fuel Cell Systems," J.R. Rostrup-Nielsen, L.J. Christiansen, and K. Aasberg-Petersen, Haldor Topsoe A/S, Grove IH Fuel Cell Symposium, September 1993. 

Rostrup-Nielsen, J.R. 1984. Catalytic steam reforming, in Catalysis science and technology, Vol. 5, J.R. Anderson, M. Boudart. Springer, Berlin Heidelberg New York, pp. 1-117. 

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